Wrench.



PATENTED DEC. 8, 1903.

G. R. cHEBsM AN.

WRENCH.

APPLICATION FILED AUG. 8. 1903'.

110 MODEL.

Patented December 8, 1903.

UNITED STATES PATENT OFFICE.

GEORGE R. CHEESMAN, OF AUBURN, NEW YORK.

WRENCH SPECIFICATION forming part of Letters Patent No. 746,023, dated December 8, 1903.

Application filed August 8, 1903- Serial Neal-63,790. (N0 model.) i

To (all whom it may concern.-

Be it known that I, GEORGE E. OHEESMAN, a citizen of the United States, residing at Auburn, in the county of Cayuga and State of New York, have invented new and useful Improvements in Wrenohes,of which the following is a specification.

This invention relates to new and useful improvements in wrenches, and especially in the provision of an adjustable frictional clutchjoint whereby the jaws may be held at different angles to the handle of the wrench, thus adapting the tool for various uses.

The invention consists, further, in the provision of a Wrench having a pivotal and spring-actuated stirrup mounted upon a fixed jaw and carrying a spring-actuated dog designed to engage teeth upon the shank portion of a sliding jaw and in the provision of a series of teeth upon an angled portion of the'fixed jaw which cooperate with teeth upon one edge of the shank portion of a movable jaw to relieve the strain upon the spring'actuated dog as pressure is applied to the wrench in turning any object.

My invention consists,'further,' in various details of construction, combinations, and arrangements ct parts, which will be hereinafter fully dOSuiflbGd and then specifically described in the appended claims.

I illustrate my invention in the accompanying drawings, in which Figure l is a perspective View of my improved wrench, showing the handle in dotted lines in an adjusted position. Fig. 2 is a longitudinal and central sectional view through the wrench. Fig. 3 is an enlarged detail view of a socket member forming a portion of the handle adapted to receive a cylindrical apertured end of the shank portion of the fixed jaw, and Fig. 4 is a perspective view of the spring-actuated dog.

Reference now being had to the details of the drawings by letter,A designates the shank portion of a fixed jaw of the wrench, having teeth a along the edge of the head A of said jaw, said series of teeth being in aline at right angles to said shank portion, and B desig nates a series of teeth formed upon an in passes through an aperture in the shank portion Aadjacent to its head, isa stirrup member D, which is chambered out to receive said shank portion A and has rounded portions 0 adjacent toits pivotal point, which turn upon shoulders E formed in the opposite faces of the shank portion A, but one of said shoulders, however, being shown in the drawings.

The rear end of the shank portion A of the fixed jaw terminates in a cylindrical portion F, which has acentral aperture run ninglongitudinally through the same for the reception of a tightening-screw F, which forms a pivot upon which the handle H is mounted. Said handle H has its pivotal end enlarged, forming a socket portion H, which latter has a conoaved recess h, made of a shape suitable to receive the cylindrical-shaped end. F of the shank A and to turn thereon. Integral wings K upon the socket portion of the bandle are adapted to project beyond the opposite edges of the concaved recess therein, and

the marginal edges of said wings are convexed, conforming to the contour of the cylindrical end F of the shank portion A. Said socket portion has longitudinal slits N therein extending from the concaved marginal wall in the recessed handle toward the free end of the latter, whereby said wings may be drawn together sufficiently to cause the inner faces of the wings to bind frictionaliy against the ends of said cylindrical end of the shank portion of the fixed jaw.

The sliding jaw Q of the wrench has a se ries of teeth Q along one of the n edges of its angled end, which te th 0 open ate with the teeth a on the fixed jaws to grip and hold the article to be turned by the wrench, and said sliding jaw has a longitudinal mov inentthrongh thestirrup llltillll} r.

The cppo ills of e stirrup me: have eion f1 therein,;

designates a dog having flanged edges T, which engage the outer faces of said stirrup member, and provided with a plurality of s all teeth on the inner face of said dog. A si f ring J is interposed between the said dog and the wall of the stirrup member and is adapted to normally throw the dogso that the teeth therein will engage the teeth q upon the outer marginal edge of the shank pertion oflthe movable jaw and hold the samein a fixed posit on. Upon the opposite or inner edge'of the shank portion of the sliding jaw I is.a series of teeth q, which are designed to engage the teeth B upon the inclined portion 5 of the fixed jaw when the stirrup rocks upon its pivot and carrying with it the movable .Jjhw, thereby relieving the strain upon the dog when the wrench is acting upon an-article to be turned thereby. 3

;A,. Pring J is secured to the outer edge of the fixed jaw, and its free end engages a portion of the stirrup which surrounds the shank portion A pf the fixed jaw, while a" second s ring 0 is fastened on the opposite edge of e-Qhank portion A, and its free end bears algainst a partition in the'chambered portion of the stirrup member, the two springs serving to normally hold the stirrup member tilt-' .if} e;d-'.orward to its farthest limit, said springs, go'i ho'wf'evenyielding when pressure is applied to the outer edge of the sliding jaw for. the

purpose of allowing the teeth and the two jaws to securely grip a n article to be acted upon by the wrench.

,5 .In Fig. 3 of the drawings I have shown the sbcket member forminga portion of the handle provided with flanges S. about the wings of-the socket portion, which flanges are adapted to surround portions of the circumferences c of the cylindrical-shaped end of the shank portion of the fixed jawfor the purpose of securely holding the two parts of the adj ustable wrench against excessive strain, this slight modification being preferably used 5 'upofr: wrenches which are adapted for heavy wor In operation when the operator desires to use the wrench with the shank portions of the jaws at angles :to the handle they may be easilyand quickly adjusted by the operator striking the tool over the edge of a bench or other object with sufficient force to tilt the parts at an angle, and owing to the wings etigaging the ends of the cylindrical portio of the shank A with such force the parts will be held ready for use in such position. By havi mg the slits in the socket portiou-of'the'handle provision is made for taking up the wear incident to the turning of the parts which;

frictionally contact with one another. jBy

drawing ba k the spring-actuated dog fromengagement with the'teeth'on the outer edge of the sliding shank portion of the movable jaw the latter may be moved longitudinally into adjusted position, and by releasing the dog teeth on the latter will engage teeth on the movable jaw and hold the jaw in an adjusted position, aud by applying pressure to the inner end of the shank portion of the sliding jaw the latter and also the pivoted stirrup carrying the same may be rdcked, throwing the series of teeth upon the angled end of movable jaw into position to securely grip the object to be acted upon by the wrench, thus securing a good hold upon the same. When the wrench is applied to the object to be turned and pressure applied to the handle, the'- teeth B will engage teeth upon the inner margin ofthe sliding jaw, thus relieving the strain upon the spring-actuated dog which engages the teeth along the outer margin of the shank portion of the sliding jaw. I

. While I have shown a particular detailed construction illustrating the features of my invention, it will be understood that I may make alterations in the construction of the same, if desired, without departing from the spirit of the invention.

. Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A wrench having a shank portion, one end of which is turned in cylindrical form which is apertured, a handle having a socket portion adapted to receive said cylindrical end, frictional clamping-wings integral with said socket portion anda tightening-screw said wings and cylindrical portion, and adapted to cause said wings to frictionally engage the ends of said cylindrical portion, as set forth; I

2. A wrench having a shank portion terminating in a cylindrical end at right angles socket portion which is concaved, and the opposite walls of said concaved portion being slitted. longitudinally with the handle, ears "projecting fromw the socket member and formin; the-end walls of the recessed] portion of the socket member,said socket mem ber adapted toreceive saidcylindrical end of the shank portion of the wrench, the outer marginal edges of said ears conforming to and flush with the circumferences of the cylindrical portion, a screw passing through registered apertures in the cylindrical end of the wrench, and adapted to. draw the ears frictionally against the ends of the cylindrical portion of the shank of the wrench, as set forth.

3. A wrench having. a. fixed jaw, a handle adjustably held by frictional clutch thereto, a stirrup memberpivoted to the fixed jaw, a movable jaw having a shank portion mounted within said stirrup member,a spring-actuated dog carried by said stirrup member having teeth adapted to engage the teeth on the outer edge of the shank portion of the movable jaw, springs carried by the fixed jaw bearing passing through the registered apertures in thereto and apertured, a handle having a against the stirrup member-to throw the same In testimony whereof I have signed my to its outer limit, a series of teeth along the name to this specification in the presence of to inner margin of the shank portion of the movtwo subscribing witnesses.

able jaw, cooperating with teeth upon the in-- clined edge of the fixed jaw, whereby the I GEORGE CHEESMAN' strain upon the dog may be relieved while Witnesses:

the wrench is under pressure in turning an FRED M. HOSMER,

object, as set forth. CIOERO J. WARNE. 

